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[flang] Add guidelines for referencing the Fortran Standard (#188591)

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In response to [[RFC] Qualifying syntax rule numbers with Fortran
standard version in
comments](https://discourse.llvm.org/t/rfc-qualifying-syntax-rule-numbers-with-fortran-standard-version-in-comments/90167)
this PR adds a section on guidelines for referencing the Fortran
Standard.
This commit is contained in:
Vineet Kumar
2026-03-31 17:21:42 -04:00
committed by GitHub
parent f43ee18e98
commit 96fd2318ee
1 changed files with 12 additions and 0 deletions
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flang/docs/C++style.md
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@@ -97,6 +97,18 @@ when creating names.
well as you do and avoid distracting her by calling out usage of new
features in comments.
### Referencing the Fortran Standard
When referencing the Fortran Standard, always qualify the reference
with the version. Use the format `F<version>` as a prefix. For
sections and paragraphs, use e.g., `F2023 9.7.3.2 p7` (Fortran
2023, section 9.7.3.2, paragraph 7). For rules and constraints,
use e.g., `F2023 R1526` or `F2018 C919`.
#### Notes
1. If no version is mentioned, the default is assumed to be `F2018`.
1. Existing code may use the `F'2023` style (with an apostrophe).
New code should omit the apostrophe for consistency.
### Layout
Always run `clang-format` on your changes before committing code. LLVM
has a `git-clang-format` script to facilitate running clang-format only